package zhangh.stu.netttpro.demo.Netty.simpleDemo;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

/**
 * @Author by KoVaVo
 * @Date 2021-04-06 21:51
 * @Desc: 新建一个客户端的Handler
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    /**
     * 当通道就绪就会触发该方法
     * @param ctx
     * @throws Exception
     */
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        System.out.println(ctx);
        ctx.writeAndFlush(Unpooled.copiedBuffer("hello server,this is nettyClientHandler", CharsetUtil.UTF_8));

    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {

        ByteBuf buf = (ByteBuf)msg;

        System.out.println("服务器回复消息："+ buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器地址："+ctx.channel().remoteAddress());
    }

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {

        System.out.println("服务器读取完毕："+ctx.channel().eventLoop().toString());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {

        cause.printStackTrace();
        ctx.close();
    }
}
